Do you think you are too old to serve God?
The world may consider it ok to throw away all your experience when you get to a certain age, but God never does!
In God’s kingdom there is no such thing as retirement, therefore God wants and expects us to continue working for Him all our lives. i.e. No matter our age there are still ways in which we can serve God.
So don’t stop serving God, just because you think your too old to be of use to Him.